Is some trading content OK or not? If not I'd look for Facebook groups maybe.
In the states you can reach out to your local AAII group and see what sites they use, too--some have email lists and there are some pretty epic presentations out there. Here's one I liked from my chapter, Petaluma:
I think "Bogleheads Investing Advice". You can learn the investing philosophy from John Bogle, Bogleheads® Wiki [0]. Also, interacting with other people through its community [1].
In the states you can reach out to your local AAII group and see what sites they use, too--some have email lists and there are some pretty epic presentations out there. Here's one I liked from my chapter, Petaluma:
https://www.youtube.com/watch?v=PEOjBcn3GKw
If some trading is OK, you might also take a look at Ed Seykota's Trading Tribe concept.
https://eseykota.com/TT/PHP_TT/home/index.php
If the resources themselves are important to you, Ritholtz shares a lot: www.ritholtz.com/blog
Tons more of those around: https://thecollegeinvestor.com/15601/the-best-investing-blog...
This is assuming you've already googled "investor community" and things like that.
I "know of" Finimize but I haven't tried it myself:
https://www.finimize.com/
Good luck in your search.